Read/Write of Multi-Byte Streams

Detailed Description

Endpoint data stream transmission and reception management.

Functions, macros, variables, enums and types related to data reading and writing of data streams from and to endpoints.

Enumerations
enum	Endpoint_Stream_RW_ErrorCodes_t {   ENDPOINT_RWSTREAM_NoError = 0, ENDPOINT_RWSTREAM_EndpointStalled = 1, ENDPOINT_RWSTREAM_DeviceDisconnected = 2, ENDPOINT_RWSTREAM_BusSuspended = 3,   ENDPOINT_RWSTREAM_Timeout = 4, ENDPOINT_RWSTREAM_IncompleteTransfer = 5 }
enum	Endpoint_ControlStream_RW_ErrorCodes_t { ENDPOINT_RWCSTREAM_NoError = 0, ENDPOINT_RWCSTREAM_HostAborted = 1, ENDPOINT_RWCSTREAM_DeviceDisconnected = 2, ENDPOINT_RWCSTREAM_BusSuspended = 3 }

Enumeration Type Documentation

enum Endpoint_ControlStream_RW_ErrorCodes_t

Enum for the possible error return codes of the Endpoint_*_Control_Stream_* functions.

Enumerator:

ENDPOINT_RWCSTREAM_NoError	Command completed successfully, no error.
ENDPOINT_RWCSTREAM_HostAborted	The aborted the transfer prematurely.
ENDPOINT_RWCSTREAM_DeviceDisconnected	Device was disconnected from the host during the transfer.
ENDPOINT_RWCSTREAM_BusSuspended	The USB bus has been suspended by the host and no USB endpoint traffic can occur until the bus has resumed.

Definition at line 88 of file EndpointStream.h.

enum Endpoint_Stream_RW_ErrorCodes_t

Enum for the possible error return codes of the Endpoint_*_Stream_* functions.

Enumerator:

ENDPOINT_RWSTREAM_NoError	Command completed successfully, no error.
ENDPOINT_RWSTREAM_EndpointStalled	The endpoint was stalled during the stream transfer by the host or device.
ENDPOINT_RWSTREAM_DeviceDisconnected	Device was disconnected from the host during the transfer.
ENDPOINT_RWSTREAM_BusSuspended	The USB bus has been suspended by the host and no USB endpoint traffic can occur until the bus has resumed.
ENDPOINT_RWSTREAM_Timeout	The host failed to accept or send the next packet within the software timeout period set by the USB_STREAM_TIMEOUT_MS macro.
ENDPOINT_RWSTREAM_IncompleteTransfer	Indicates that the endpoint bank became full or empty before the complete contents of the current stream could be transferred. The endpoint stream function should be called again to process the next chunk of data in the transfer.

Definition at line 63 of file EndpointStream.h.

Function Documentation

uint8_t Endpoint_Discard_Stream	(	uint8_t	corenum,
		uint16_t	Length,
		uint16_t *const	BytesProcessed
	)

Reads and discards the given number of bytes from the currently selected endpoint's bank, discarding fully read packets from the host as needed. The last packet is not automatically discarded once the remaining bytes has been read; the user is responsible for manually discarding the last packet from the host via the Endpoint_ClearOUT() macro.

If the BytesProcessed parameter is NULL, the entire stream transfer is attempted at once, failing or succeeding as a single unit. If the BytesProcessed parameter points to a valid storage location, the transfer will instead be performed as a series of chunks. Each time the endpoint bank becomes empty while there is still data to process (and after the current packet has been acknowledged) the BytesProcessed location will be updated with the total number of bytes processed in the stream, and the function will exit with an error code of ENDPOINT_RWSTREAM_IncompleteTransfer. This allows for any abort checking to be performed in the user code - to continue the transfer, call the function again with identical parameters and it will resume until the BytesProcessed value reaches the total transfer length.

Single Stream Transfer Example:

uint8_t ErrorCode;

if ((ErrorCode = Endpoint_Discard_Stream(512, NULL)) != ENDPOINT_RWSTREAM_NoError)
{
     // Stream failed to complete - check ErrorCode here
}

Partial Stream Transfers Example:

uint8_t  ErrorCode;
uint16_t BytesProcessed;

BytesProcessed = 0;
while ((ErrorCode = Endpoint_Discard_Stream(512, &BytesProcessed)) == ENDPOINT_RWSTREAM_IncompleteTransfer)
{
    // Stream not yet complete - do other actions here, abort if required
}

if (ErrorCode != ENDPOINT_RWSTREAM_NoError)
{
    // Stream failed to complete - check ErrorCode here
}

Note

This routine should not be used on CONTROL type endpoints.

Parameters

corenum	ID Number of USB Core to be processed.
Length	Number of bytes to discard via the currently selected endpoint.
BytesProcessed	Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be read at once.
Length	: Number of bytes to discard via the currently selected endpoint
BytesProcessed	: Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be read at once.

Returns

A value from the Endpoint_Stream_RW_ErrorCodes_t enum

Definition at line 40 of file EndpointStream.c.

uint8_t Endpoint_Null_Stream	(	uint8_t	corenum,
		uint16_t	Length,
		uint16_t *const	BytesProcessed
	)

Writes a given number of zeroed bytes to the currently selected endpoint's bank, sending full packets to the host as needed. The last packet is not automatically sent once the remaining bytes have been written; the user is responsible for manually sending the last packet to the host via the Endpoint_ClearIN() macro.

If the BytesProcessed parameter is NULL, the entire stream transfer is attempted at once, failing or succeeding as a single unit. If the BytesProcessed parameter points to a valid storage location, the transfer will instead be performed as a series of chunks. Each time the endpoint bank becomes full while there is still data to process (and after the current packet transmission has been initiated) the BytesProcessed location will be updated with the total number of bytes processed in the stream, and the function will exit with an error code of ENDPOINT_RWSTREAM_IncompleteTransfer. This allows for any abort checking to be performed in the user code - to continue the transfer, call the function again with identical parameters and it will resume until the BytesProcessed value reaches the total transfer length.

Single Stream Transfer Example:

uint8_t ErrorCode;

if ((ErrorCode = Endpoint_Null_Stream(512, NULL)) != ENDPOINT_RWSTREAM_NoError)
{
     // Stream failed to complete - check ErrorCode here
}

Partial Stream Transfers Example:

uint8_t  ErrorCode;
uint16_t BytesProcessed;

BytesProcessed = 0;
while ((ErrorCode = Endpoint_Null_Stream(512, &BytesProcessed)) == ENDPOINT_RWSTREAM_IncompleteTransfer)
{
    // Stream not yet complete - do other actions here, abort if required
}

if (ErrorCode != ENDPOINT_RWSTREAM_NoError)
{
    // Stream failed to complete - check ErrorCode here
}

Note

This routine should not be used on CONTROL type endpoints.

Parameters

corenum	ID Number of USB Core to be processed.
Length	Number of zero bytes to send via the currently selected endpoint.
BytesProcessed	Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be read at once.
Length	: Number of zero bytes to send via the currently selected endpoint
BytesProcessed	: Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be read at once

Returns

A value from the Endpoint_Stream_RW_ErrorCodes_t enum

Definition at line 50 of file EndpointStream.c.

uint8_t Endpoint_Read_Control_EStream_BE	(	void *const	Buffer,
		uint16_t	Length
	)

Endpoint Read Control EEPROM Stream Big Endian.

Note

This function automatically clears the control transfer's status stage. Do not manually attempt to clear the status stage when using this routine in a control transaction.

This routine should only be used on CONTROL type endpoints.

Warning

Unlike the standard stream read/write commands, the control stream commands cannot be chained together; i.e. the entire stream data must be read or written at the one time.

Parameters

Buffer	: Pointer to the destination data buffer to write to
Length	: Number of bytes to send via the currently selected endpoint

Returns

A value from the Endpoint_ControlStream_RW_ErrorCodes_t enum

uint8_t Endpoint_Read_Control_EStream_LE	(	void *const	Buffer,
		uint16_t	Length
	)

Endpoint Read Control EEPROM Stream Little Endian.

Note

This function automatically clears the control transfer's status stage. Do not manually attempt to clear the status stage when using this routine in a control transaction.

This routine should only be used on CONTROL type endpoints.

Warning

Unlike the standard stream read/write commands, the control stream commands cannot be chained together; i.e. the entire stream data must be read or written at the one time.

Parameters

Buffer	: Pointer to the destination data buffer to write to
Length	: Number of bytes to send via the currently selected endpoint

Returns

A value from the Endpoint_ControlStream_RW_ErrorCodes_t enum

uint8_t Endpoint_Read_Control_Stream_BE	(	void *const	Buffer,
		uint16_t	Length
	)

Reads the given number of bytes from the CONTROL endpoint from the given buffer in big endian, discarding fully read packets from the host as needed. The device IN acknowledgement is not automatically sent after success or failure states; the user is responsible for manually sending the setup IN to finalize the transfer via the Endpoint_ClearIN() macro.

Note

This function automatically clears the control transfer's status stage. Do not manually attempt to clear the status stage when using this routine in a control transaction.

This routine should only be used on CONTROL type endpoints.

Warning

Unlike the standard stream read/write commands, the control stream commands cannot be chained together; i.e. the entire stream data must be read or written at the one time.

Parameters

Buffer	: Pointer to the destination data buffer to write to
Length	: Number of bytes to send via the currently selected endpoint

Returns

A value from the Endpoint_ControlStream_RW_ErrorCodes_t enum

Definition at line 153 of file EndpointStream.c.

uint8_t Endpoint_Read_Control_Stream_LE	(	uint8_t	corenum,
		void *const	Buffer,
		uint16_t	Length
	)

Reads the given number of bytes from the CONTROL endpoint from the given buffer in little endian, discarding fully read packets from the host as needed. The device IN acknowledgement is not automatically sent after success or failure states; the user is responsible for manually sending the setup IN to finalize the transfer via the Endpoint_ClearIN() macro.

Note

This function automatically clears the control transfer's status stage. Do not manually attempt to clear the status stage when using this routine in a control transaction.

This routine should only be used on CONTROL type endpoints.

Warning

Unlike the standard stream read/write commands, the control stream commands cannot be chained together; i.e. the entire stream data must be read or written at the one time.

Parameters

corenum	ID Number of USB Core to be processed.
Buffer	: Pointer to the destination data buffer to write to
Length	: Number of bytes to send via the currently selected endpoint

Returns

A value from the Endpoint_ControlStream_RW_ErrorCodes_t enum

Definition at line 144 of file EndpointStream.c.

uint8_t Endpoint_Read_EStream_BE	(	void *const	Buffer,
		uint16_t	Length,
		uint16_t *const	BytesProcessed
	)

Endpoint Read EEPROM Stream Big Endian.

Parameters

Buffer	: Pointer to the destination data buffer to write to, located in EEPROM memory space
Length	: Number of bytes to send via the currently selected endpoint
BytesProcessed	: Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be read at once

Returns

A value from the Endpoint_Stream_RW_ErrorCodes_t enum

uint8_t Endpoint_Read_EStream_LE	(	void *const	Buffer,
		uint16_t	Length,
		uint16_t *const	BytesProcessed
	)

Endpoint Read EEPROM Stream Little Endian.

Parameters

Buffer	: Pointer to the destination data buffer to write to, located in EEPROM memory space
Length	: Number of bytes to send via the currently selected endpoint
BytesProcessed	: Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be read at once

Returns

A value from the Endpoint_Stream_RW_ErrorCodes_t enum

uint8_t Endpoint_Read_Stream_BE	(	void *const	Buffer,
		uint16_t	Length,
		uint16_t *const	BytesProcessed
	)

Reads the given number of bytes from the endpoint from the given buffer in big endian, discarding fully read packets from the host as needed. The last packet is not automatically discarded once the remaining bytes has been read; the user is responsible for manually discarding the last packet from the host via the Endpoint_ClearOUT() macro.

Note

This routine should not be used on CONTROL type endpoints.

Parameters

Buffer	: Pointer to the destination data buffer to write to
Length	: Number of bytes to send via the currently selected endpoint
BytesProcessed	: Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be read at once

Returns

A value from the Endpoint_Stream_RW_ErrorCodes_t enum

Definition at line 118 of file EndpointStream.c.

uint8_t Endpoint_Read_Stream_LE	(	uint8_t	corenum,
		void *const	Buffer,
		uint16_t	Length,
		uint16_t *const	BytesProcessed
	)

Reads the given number of bytes from the endpoint from the given buffer in little endian, discarding fully read packets from the host as needed. The last packet is not automatically discarded once the remaining bytes has been read; the user is responsible for manually discarding the last packet from the host via the Endpoint_ClearOUT() macro.

If the BytesProcessed parameter is NULL, the entire stream transfer is attempted at once, failing or succeeding as a single unit. If the BytesProcessed parameter points to a valid storage location, the transfer will instead be performed as a series of chunks. Each time the endpoint bank becomes empty while there is still data to process (and after the current packet has been acknowledged) the BytesProcessed location will be updated with the total number of bytes processed in the stream, and the function will exit with an error code of ENDPOINT_RWSTREAM_IncompleteTransfer. This allows for any abort checking to be performed in the user code - to continue the transfer, call the function again with identical parameters and it will resume until the BytesProcessed value reaches the total transfer length.

Single Stream Transfer Example:

uint8_t DataStream[512];
uint8_t ErrorCode;

if ((ErrorCode = Endpoint_Read_Stream_LE(DataStream, sizeof(DataStream),
                                         NULL)) != ENDPOINT_RWSTREAM_NoError)
{
     // Stream failed to complete - check ErrorCode here
}

Partial Stream Transfers Example:

uint8_t  DataStream[512];
uint8_t  ErrorCode;
uint16_t BytesProcessed;

BytesProcessed = 0;
while ((ErrorCode = Endpoint_Read_Stream_LE(DataStream, sizeof(DataStream),
                                            &BytesProcessed)) == ENDPOINT_RWSTREAM_IncompleteTransfer)
{
    // Stream not yet complete - do other actions here, abort if required
}

if (ErrorCode != ENDPOINT_RWSTREAM_NoError)
{
    // Stream failed to complete - check ErrorCode here
}

Note

This routine should not be used on CONTROL type endpoints.

Parameters

	corenum	ID Number of USB Core to be processed.
[out]	Buffer	Pointer to the destination data buffer to write to.
	Length	Number of bytes to send via the currently selected endpoint.
	BytesProcessed	Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be read at once.
	Buffer	: Pointer to the destination data buffer to write to
	Length	: Number of bytes to send via the currently selected endpoint
	BytesProcessed	: Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be written at once

Returns

A value from the Endpoint_Stream_RW_ErrorCodes_t enum

Definition at line 92 of file EndpointStream.c.

uint8_t Endpoint_Write_Control_EStream_BE	(	const void *const	Buffer,
		uint16_t	Length
	)

Endpoint Write Control EEPROM Stream Big Endian.

Note

This function automatically clears the control transfer's status stage. Do not manually attempt to clear the status stage when using this routine in a control transaction.

This routine should only be used on CONTROL type endpoints.

Warning

Unlike the standard stream read/write commands, the control stream commands cannot be chained together; i.e. the entire stream data must be read or written at the one time.

Parameters

Buffer	: Pointer to the source data buffer to read from
Length	: Number of bytes to read for the currently selected endpoint into the buffer

Returns

A value from the Endpoint_ControlStream_RW_ErrorCodes_t enum

uint8_t Endpoint_Write_Control_EStream_LE	(	const void *const	Buffer,
		uint16_t	Length
	)

Endpoint Write Control EEPROM Stream Little Endian.

Note

This function automatically clears the control transfer's status stage. Do not manually attempt to clear the status stage when using this routine in a control transaction.

This routine should only be used on CONTROL type endpoints.

Warning

Unlike the standard stream read/write commands, the control stream commands cannot be chained together; i.e. the entire stream data must be read or written at the one time.

Parameters

Buffer	: Pointer to the source data buffer to read from
Length	: Number of bytes to read for the currently selected endpoint into the buffer

Returns

A value from the Endpoint_ControlStream_RW_ErrorCodes_t enum

uint8_t Endpoint_Write_Control_PStream_BE	(	const void *const	Buffer,
		uint16_t	Length
	)

Endpoint Write Control PROGMEM Stream Big Endian.

Parameters

Buffer	: Pointer to the source data buffer to read from
Length	: Number of bytes to read for the currently selected endpoint into the buffer

Returns

A value from the Endpoint_ControlStream_RW_ErrorCodes_t enum

uint8_t Endpoint_Write_Control_PStream_LE	(	const void *const	Buffer,
		uint16_t	Length
	)

Endpoint Write Control PROGMEM Stream Little Endian.

Parameters

Buffer	: Pointer to the source data buffer to read from
Length	: Number of bytes to read for the currently selected endpoint into the buffer

Returns

A value from the Endpoint_ControlStream_RW_ErrorCodes_t enum

uint8_t Endpoint_Write_Control_Stream_BE	(	const void *const	Buffer,
		uint16_t	Length
	)

Writes the given number of bytes to the CONTROL type endpoint from the given buffer in big endian, sending full packets to the host as needed. The host OUT acknowledgement is not automatically cleared in both failure and success states; the user is responsible for manually clearing the setup OUT to finalize the transfer via the Endpoint_ClearOUT() macro.

Note

This function automatically clears the control transfer's status stage. Do not manually attempt to clear the status stage when using this routine in a control transaction.

This routine should only be used on CONTROL type endpoints.

Warning

Unlike the standard stream read/write commands, the control stream commands cannot be chained together; i.e. the entire stream data must be read or written at the one time.

Parameters

Buffer	: Pointer to the source data buffer to read from
Length	: Number of bytes to read for the currently selected endpoint into the buffer

Returns

A value from the Endpoint_ControlStream_RW_ErrorCodes_t enum

Definition at line 138 of file EndpointStream.c.

uint8_t Endpoint_Write_Control_Stream_LE	(	uint8_t	corenum,
		const void *const	Buffer,
		uint16_t	Length
	)

Writes the given number of bytes to the CONTROL type endpoint from the given buffer in little endian, sending full packets to the host as needed. The host OUT acknowledgement is not automatically cleared in both failure and success states; the user is responsible for manually clearing the setup OUT to finalize the transfer via the Endpoint_ClearOUT() macro.

Note

This function automatically clears the control transfer's status stage. Do not manually attempt to clear the status stage when using this routine in a control transaction.

This routine should only be used on CONTROL type endpoints.

Warning

Unlike the standard stream read/write commands, the control stream commands cannot be chained together; i.e. the entire stream data must be read or written at the one time.

Parameters

corenum	ID Number of USB Core to be processed.
Buffer	: Pointer to the source data buffer to read from
Length	: Number of bytes to read for the currently selected endpoint into the buffer

Returns

A value from the Endpoint_ControlStream_RW_ErrorCodes_t enum

Definition at line 127 of file EndpointStream.c.

uint8_t Endpoint_Write_EStream_BE	(	const void *const	Buffer,
		uint16_t	Length,
		uint16_t *const	BytesProcessed
	)

Endpoint Write EEPROM Stream Big Endian.

Parameters

Buffer	: Pointer to the source data buffer to read from
Length	: Number of bytes to read for the currently selected endpoint into the buffer
BytesProcessed	: Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be written at once

Returns

A value from the Endpoint_Stream_RW_ErrorCodes_t enum

uint8_t Endpoint_Write_EStream_LE	(	const void *const	Buffer,
		uint16_t	Length,
		uint16_t *const	BytesProcessed
	)

Endpoint Write EEPROM Stream Little Endian.

Parameters

Buffer	: Pointer to the source data buffer to read from
Length	: Number of bytes to read for the currently selected endpoint into the buffer
BytesProcessed	: Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be written at once

Returns

A value from the Endpoint_Stream_RW_ErrorCodes_t enum

uint8_t Endpoint_Write_PStream_BE	(	const void *const	Buffer,
		uint16_t	Length,
		uint16_t *const	BytesProcessed
	)

Endpoint Write PROGMEM Stream Big Endian.

Parameters

Buffer	: Pointer to the source data buffer to read from
Length	: Number of bytes to read for the currently selected endpoint into the buffer
BytesProcessed	: Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be written at once.

Returns

A value from the Endpoint_Stream_RW_ErrorCodes_t enum

uint8_t Endpoint_Write_PStream_LE	(	const void *const	Buffer,
		uint16_t	Length,
		uint16_t *const	BytesProcessed
	)

Endpoint Write PROGMEM Stream Little Endian.

Parameters

Buffer	: Pointer to the source data buffer to read from
Length	: Number of bytes to read for the currently selected endpoint into the buffer
BytesProcessed	: Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be written at once.

Returns

A value from the Endpoint_Stream_RW_ErrorCodes_t enum

uint8_t Endpoint_Write_Stream_BE	(	uint8_t	corenum,
		const void *const	Buffer,
		uint16_t	Length,
		uint16_t *const	BytesProcessed
	)

Writes the given number of bytes to the endpoint from the given buffer in big endian, sending full packets to the host as needed. The last packet filled is not automatically sent; the user is responsible for manually sending the last written packet to the host via the Endpoint_ClearIN() macro.

Note

This routine should not be used on CONTROL type endpoints.

Parameters

corenum	ID Number of USB Core to be processed.
Buffer	: Pointer to the source data buffer to read from
Length	: Number of bytes to read for the currently selected endpoint into the buffer
BytesProcessed	: Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be written at once

Returns

A value from the Endpoint_Stream_RW_ErrorCodes_t enum

Definition at line 80 of file EndpointStream.c.

uint8_t Endpoint_Write_Stream_LE	(	uint8_t	corenum,
		const void *const	Buffer,
		uint16_t	Length,
		uint16_t *const	BytesProcessed
	)

Writes the given number of bytes to the endpoint from the given buffer in little endian, sending full packets to the host as needed. The last packet filled is not automatically sent; the user is responsible for manually sending the last written packet to the host via the Endpoint_ClearIN() macro.

If the BytesProcessed parameter is NULL, the entire stream transfer is attempted at once, failing or succeeding as a single unit. If the BytesProcessed parameter points to a valid storage location, the transfer will instead be performed as a series of chunks. Each time the endpoint bank becomes full while there is still data to process (and after the current packet transmission has been initiated) the BytesProcessed location will be updated with the total number of bytes processed in the stream, and the function will exit with an error code of ENDPOINT_RWSTREAM_IncompleteTransfer. This allows for any abort checking to be performed in the user code - to continue the transfer, call the function again with identical parameters and it will resume until the BytesProcessed value reaches the total transfer length.

Single Stream Transfer Example:

uint8_t DataStream[512];
uint8_t ErrorCode;

if ((ErrorCode = Endpoint_Write_Stream_LE(DataStream, sizeof(DataStream),
                                          NULL)) != ENDPOINT_RWSTREAM_NoError)
{
     // Stream failed to complete - check ErrorCode here
}

Partial Stream Transfers Example:

uint8_t  DataStream[512];
uint8_t  ErrorCode;
uint16_t BytesProcessed;

BytesProcessed = 0;
while ((ErrorCode = Endpoint_Write_Stream_LE(DataStream, sizeof(DataStream),
                                             &BytesProcessed)) == ENDPOINT_RWSTREAM_IncompleteTransfer)
{
    // Stream not yet complete - do other actions here, abort if required
}

if (ErrorCode != ENDPOINT_RWSTREAM_NoError)
{
    // Stream failed to complete - check ErrorCode here
}

Note

This routine should not be used on CONTROL type endpoints.

Parameters

corenum	ID Number of USB Core to be processed.
Buffer	Pointer to the source data buffer to read from.
Length	Number of bytes to read for the currently selected endpoint into the buffer.
BytesProcessed	Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be written at once.
Buffer	: Pointer to the source data buffer to read from
Length	: Number of bytes to read for the currently selected endpoint into the buffer
BytesProcessed	: Pointer to a location where the total number of bytes processed in the current transaction should be updated, NULL if the entire stream should be written at once

Returns

A value from the Endpoint_Stream_RW_ErrorCodes_t enum

Definition at line 64 of file EndpointStream.c.